The appearance of the Sex Pistols in 1976 seemed less like the arrival of a band than a warning from a nightmarish future. Sex Pistols: Poison in the Machine examines the group's explosive impact by placing Malcolm McLaren's audacious, self-sabotaging art project at its centre - a scheme forged from radical politics, cultural fatigue and a genius for provocation. John Scanlan traces how this volatile experiment collided with the Pistols' own musical force and John Lydon's unc...